12 x 8 Shire Cali Insulated Garden Office

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12 x 8 Shire Cali Insulated Garden Office - in situ, angle view
  • 12 x 8 Shire Cali Insulated Garden Office - in situ, angle view
  • 12 x 8 Shire Cali Insulated Garden Office - in situ, angle view , lhs
  • 12 x 8 Shire Cali Insulated Garden Office - Isolated, Doors Closed
  • 12 x 8 Shire Cali Insulated Garden Office - Isolated, Doors Open
  • 12 x 8 Shire Cali Insulated Garden Office - Front View, Doors Closed
  • Shire 12 x 8 Shire Cali Insulated Garden Office
  • 12 x 8 Shire Cali Insulated Garden Office - internal windows and door
  • 12 x 8 Shire Cali Insulated Garden Office - vinyl floor
  • 12 x 8 Shire Cali Insulated Garden Office - colours
  • 12 x 8 Shire Cali Insulated Garden Office - Dimensions
  • 12 x 8 Shire Cali Insulated Garden Office - Footprint

Key Features

Bespoke and Made to Measure

Bespoke or made to measure
Bespoke or made to measure
Contact our Sales Teams for more information on our bespoke service

12 x 8 Shire Cali Insulated Garden Office

Save £885.00
NEW - Installation - Free Installation
NEW - Interest Free Credit
NEW - Guarantee - 10 year - gold

Product Code - 10040143


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Usually delivered: 14 Days Delivery.
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  • 12 x 8 Shire Cali Insulated Garden Office£7,099.00


            The 12 x 8 Cali Pent Garden office is a stylish summerhouse with a modern design. The interior is bright thanks to the pent roof, windows, and fully glazed double doors. The striking design makes this perfect for a stylish garden office pod.  

            A high-quality wooden summerhouse is the ultimate upgrade for your garden. The versatile interior and adaptable design allow you to use this garden room in many ways. As it has ample interior, it’s a multifunctional garden building. Create an office in one area, and add comfy seating for a relaxing space. Alternatively, add gym equipment to part of the space and use the rest for a stylish garden dining area. A professional summerhouse installation team installs the wooden summerhouse. You will need to create a firm and level base, preferably concrete.

            The double doors provide excellent ventilation, and as they are fully glazed, you get lots of light inside the garden room even when closed. The external cladding is made with  engineered wood board with a cedar finish. The walls are treated with an advanced formula of adhesive resins, water-resistant waxes and zinc borate. A Water-resistant, resin-saturated overlay is then bonded to the product. It gives the structure four components to help resist fungal decay and insect damage. All binding agents and resins are low-emitting.

            The engineered wood board resists buckling, peeling, cracking, chipping and more.

            The superior treatment means you don’t have to carry out any maintenance. You won’t need to paint it every year. However, you can refresh the paint to keep it looking new.

            The internal cladding features an MDF board which is moisture-resistant. An Oxford profile finish gives the walls a grooved look that imitates traditional cladding.  YBS Airtec Double insulation is used within the walls and roof. It consists of highly reflective aluminium foil with a laminated surface for durability on either side of an air bubble membrane. The membrane acts as a Vapour Control Layer. An R-Value of 1.45 Airtec Double equals around 55mm of Polystyrene.

            The flooring of the summerhouse is made with tongue and groove boards for strength. A 25mm Celotex insulation is also included with the floor to help keep the interior at a comfortable temperature. A herringbone vinyl flooring finish makes the interior feel high-end. 

            The high-end features of this modern garden office include handcrafted joinery on the windows and doors.  You also have an option for UPVC Windows and doors or Aluminium windows and doors in anthracite grey, black or white.  Choosing this option will extend the delivery time. These options will reduce the door height slightly, and prices are available on request.

            Your Dream Space: Luxurious Building with Exquisite Pre-Painted Finish

            Choose a mix of your favourite colours or select hues that complement each other. The Cali is supplied factory painted internally and externally in one of these available colours: Aegean, Anthracite, Champagne, Coastal Blue, Dark Brown, Green Tea, Gull Grey, Lime Green, Rustic Brown, Sage Green, Silver Birch and Vanilla Cream.  You can choose a different colour for the inside and outside. Choose a mix of your favourite colours or select hues that complement each other. 

            In just a matter of days after your order is confirmed, the manufacturer's dedicated team will reach out to you regarding your paint preferences and choices.

            Also available: Cali 8x8 Pent, Cali 12x8 Pent & Storage, Cali 16x8 Pent, Cali 16x8 Pent & Storage, Cali 20x8 Pent, Cali 20x8 Pent & Storage, Cali 12x12 Pent, Cali 12x12 Pent & Storage, Cali 16x12 Pen, Cali 16x12 Pent & Storage, Cali 20x12 Pent, Cali 20x12 Pent & Storage

            Bespoke Garden Office Service

            The Shire Cali Summerhouse range is available with bespoke design options. You can switch up the design to suit your tastes and preferences. Want to reduce the number of windows and add a skylight instead? You can! Want more windows or a more expansive floor plan? That’s available too. Contact us to find out how to design your dream bespoke garden office today.

            Gorilla Ground Screws

            Unlike conventional foundations, ground screws, typically 1050mm and 1200mm in length, offer a quick and clean installation process. By eliminating the need for digging and concrete, ground screws avoid the associated mess and disruption, while also being a more economical option. For more details, please refer to the 'Choose Additional Options' section above.

            Read more about this exceptional product by clicking here.


            Guarantee - 10-year warranty

            Walls - 11mm external engineered wood board with cedar finish + 25mm YBS Airtec Double insulation + Internal 12mm MDF moisture resistant board, grooved to imitate classic cladding

            Floor -  44mm thickness includes: 19mm tongue and groove + 25mm Celotex + internally finished with herringbone effect vinyl

            Roof - 48mm thickness includes: 11mm OSB Topside + 25mm YBS Airtec Double insulation + Internal 12mm MDF moisture resistant board, grooved to imitate classic cladding + EPDM Rubber Roof 

            Frame - 70mm x 44mm

            Windows - double glazed 2 x opening front windows, 2 x opening side windows

            Doors - double doors with full-length double glazing

            Treatment - Zinc borate-based process

            Make the Most of Your Summerhouse:

            The Shire Cali 12x8 Summerhouse is a medium-sized garden office pod you and your family can use in many ways. Make it a covered outdoor eating area by adding a table and chairs. If you love crafting, add a worktop, chair, and storage to make it a garden craft room. Add office furniture as a garden office, perfect for inspiring creativity.   The sleek design and refined exterior finish make this a summerhouse you will love for years.

            About Your Order:

            The Shire Garden Office Pod is a British-made garden building made from FSC® certified timber. You will get a low-carbon footprint summerhouse made from ethically sourced materials. It comes with a 10-year warranty. 

            Price includes assembly by Shire’s professional fitting team. You’ll need a firm and level concrete base. Our manufacturer’s assembly team will contact you requesting images of the base.  Occasionally, they may visit the site to confirm the base is suitable for assembly. Once they have confirmed the base is appropriate, you will be given a delivery/assembly date (delivery and assembly are on the same day).

            Please note: Images depict the summerhouse pre-painted and with furnishings and accessories; these are for illustration purposes only and are not included with your order.

            Garden Office Aftercare:

            The home garden office has been treated using a proprietary zinc borate-based process.  As this is an advanced treatment, it makes it a maintenance-free garden building. If required, you can repaint the building to keep it looking new.

            About Shire:

            Shire is one of the UK's leading manufacturers of garden buildings. Shire proudly manufactures the most extensive UK timber garden building range. Their range includes Garden Sheds, Log Cabins, Eco Homes, Home Offices, Sheds, Workshops, Summerhouses, Playhouses, Arbours, Storage units, and Pet houses.

            Their UK production facilities cover 23 acres, including stock holding facilities and an advanced high-speed timber planing mill. There is also a modern, well-equipped joinery production facility and semi-automated production lines. All Shire garden buildings are manufactured in the UK using the finest spruce timber, imported directly, and manufactured using the most up-to-date machines to ensure the best quality and best value-for-money garden sheds in the UK.


            Welcome to Cali! When you purchase our products, rest assured that the prices include both building and assembly services. After placing your order, expect to hear from Shire, our trusted manufacturer, within 5 working days. You'll receive either a text message or an automated telephone message (if a mobile number isn't provided), guiding you to a website where you can accept the terms and conditions for assembly. Please note that any delay in accepting these terms may impact your delivery timeline.

            Once you've accepted the terms, we'll schedule your delivery and assembly within the specified timeframe. It's important to ensure that your garden has full access, with 18" clearance all around the building and a firm, level base ready. Please be aware that our installation team won't carry the building through your home, garage, or any other structure, as this isn't covered by our insurance policy.

            Delivery and assembly lead times for Cali products vary. While FREE delivery is available to most mainland UK postcodes, some areas may incur a surcharge, and certain postcodes might not be covered. Use our 'Delivery cost checker' tool to confirm availability and any additional charges.

            Keep in mind that lead times provided on our product pages are estimates and may be longer during peak seasons. These estimates are provided by the manufacturers and are subject to change due to demand fluctuations. However, we strive to deliver in good faith and provide a representative timeframe. Delivery is typically made by Shire using a 17-ton flat-bed vehicle, similar in size to a council refuse lorry, between 7 am and 7 pm.

            Ground Screws Delivery and Installation

            For ground screws delivery and installation, communication and coordination will be handled directly by Gorilla Ground Screws. Expect to hear from their team within 5 working days to discuss the ground screw area. They'll collaborate closely with Shire's assembly team to ensure seamless integration with your Cali installation.


            Please note: all imperial measurements are approximate and Shire Garden Offices are made from metric measurements. We would recommend that the base is at least 50mm bigger in each direction.


            Product Name:
            12 x 8 Shire Cali Insulated Garden Office
            Free installation
            Optional Installation:
            Installation included in the price
            4.09m (9'0")
            3.34m (10'11")
            Footprint Width:
            3.66m (12'0")
            Footprint Depth:
            2.58m (8'6")
            Footprint Width (Internal):
            3.52m (11'7")
            Footprint Depth (Internal):
            2.44m (8'0")
            Height to Ridge:
            2.46m (8'1")
            Height to Eaves:
            2.20m (7'3")
          • Exterior and internal walls are pre-painted in off white Technos paint (You will be contacted after your order is placed to confirm your selection of exterior paint colour)
          • 11mm external engineered wood board with cedar finish
          • 25mm YBS Airtec Double insulation
          • Internal 12mm MDF moisture resistant board, grooved to imitate classic cladding
          • Floor Material
          • 19mm tongue and groove
          • Fully insulated with 25mm Celotex
          • Internally finished with herringbone effect vinyl
          • Floor Thickness:
            44mm + Vinyl flooring
            Floor Joists:
            70mm x 44mm (3" x 2")
            Floor Joist Direction:
            Side to side
            Roof Type:
            Roofing Felt:
            EPDM Rubber Roof (with 50 year guarantee)
            Roof Material:
          • 11mm OSB Topside
          • 25mm YBS Airtec Double insulation
          • Internal 12mm MDF moisture resistant board, grooved to imitate classic cladding
          • Roof Thickness:
            Roof Joists:
            70mm x 44mm (3" x 2")
          • Standard: Double glazed wooden double doors
          • Option to enhance double doors with UPVC frames with double glazing (please contact our sales team for a quote)
          • Door Height:
            1.81m (5'11")
            Door Width:
            1.42m (4'8")
            Door Lock System:
            3-Lever mortice lock (supplied with two keys)
            Number of Windows:
            2 x opening front windows
            2 x opening side windows
            Window(s) and Door location:
            Please contact our sales team if you require different window and door configurations
            Window Material:*
          • Standard: Double glazed wooden windows
          • Option to enhance windows with UPVC frames with double glazing (please contact our sales team for a quote)
          • Optional UPVC Double Glazed Skylight available (please contact our sales team for a quote)
          • Window Height:
            1.54m (5'1")
            Window Width:
            0.64m (2'1")
            Optional Roofing Felt Tiles:
            Optional Base (to be used instead of a concrete base)
            Proprietary Zinc Borate-Based process
            Recommended Treatment:
            Supplied treated
            Energy Rating for Building:
            R value of 1.45 - wall and roof
            Manufacturer's Guarantee:
            10 Year Anti-Rot
            FSC Certified:
            Free Delivery*:
            Product Code:
            Manufacturer Code:
            EAN Number:
            Shire Garden Buildings
            Country of Origin:
            United Kingdom
            Click to View Alternative Sizes:
            8x8, 12x8, 12x8 inc storage, 12x12, 12x12 inc storage, 16x8, 16x8 inc storage, 16x12, 16x12 inc storage, 20x8, 20x8 inc storage, 20x12, 20x12 inc storage

            *Contact our Sales Team to receive a quote for your choice of optional uPVC windows, doors, and skylights.


            The 12 x 8 Shire Cali Pent Garden Office is a chic garden building. It’s a garden pod you can use in many ways. The key features include:

            • Installation is included in the price
            • Inclusive Painting for Interior and Exterior (Colour Selection Post Ordering)
            • No treatment needed
            • Windows and doors double glazed 
            • 20mm Flooring with Herringbone Vinyl flooring
            • Option for UPVC Double glazing and a skylight
            • EPDM Roofing with 50 Year Guarantee
            • 10-year anti-rot guarantee

            Ground Screws

            We've streamlined your purchasing experience by offering both installation and construction of a base in one convenient package. No more hassle of searching for a reliable tradesman or dealing with the complexities of concrete – we've got you covered.

            We've listened to our customers' feedback and understand the challenges they face when it comes to finding someone to construct their base. That's why we're excited to introduce our Groilla Ground Screw option, providing you with a versatile alternative to traditional foundations.

            Here are some key features of our ground screw system:

            • Sub-frame included (some buildings will have the sub-frame as part of the building.
            • Swift and clean installation process: Say goodbye to the mess and disruption associated with digging and pouring concrete. Our ground screws offer a hassle-free installation experience.
            • Versatile application: Whether you have sloping, soft ground or existing surfaces like tarmac or concrete, our ground screws can be installed without the need for extensive excavation or labour expenses.
            • All-weather installation: No need to worry about project delays due to weather conditions. Our ground screws can be installed year-round, rain or shine.
            • Enhanced building longevity: Unlike hard ground surfaces that can cause splash back and rot the lower parts of your building, our ground screw system ensures a durable and stable foundation for years to come.

            Experience the benefits of our cost-effective and eco-friendly base system by clicking here  to learn more. Say goodbye to the headaches of traditional foundations and hello to a smoother, more efficient installation process with our Shire Cali Garden Office.

            Order Process:

            • Once you place an order for ground screws, it will be seamlessly handled by our third-party partner Gorilla Ground Screws.
            • You can anticipate receiving communication from their team within 2-3 working days to confirm acceptance of your order and to discuss the installation area for the ground screws.
            • Following this, you'll receive a pre-installation questionnaire to complete.
            • Once Gorilla Ground Screws receives and reviews the questionnaire without concerns, they will contact you to schedule the ground screw installation.
            • A confirmation call will be made 1-2 days before the scheduled installation date.

            Terms and Conditions for Gorilla Ground Screws:

            By ordering Gorilla Ground Screws, you acknowledge and accept the Terms and Conditions. You can view them by clicking here . Please note that these Terms and Conditions are in addition to the elbec terms and conditions.

            Note: Both the Cali Summerhouse and its installation communication will be managed jointly by elbec and Shire Garden Buildings.